Bump actions/setup-python from 2 to 4 (#49)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/check.yml

@@ -23,14 +23,14 @@ jobs:
           - 3.7
     steps:
       - name: setup python for tox
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: install tox
         run: python -m pip install tox
       - uses: actions/checkout@v3
       - name: setup python for test ${{ matrix.py }}
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.py }}
       - name: pick environment to run
@@ -62,7 +62,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: setup Python 3.10
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: install tox
@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-20.04
     steps:
       - name: setup python to build package
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: "3.10"
       - name: install build